# 变量
# a = 10
# b = a
# print(b)

a = b = c = d = 11
print(a)
print(b)
print(c)
print(d)

# int  str
# int + str -->TypeError
a = 2
b = '44'
# print(a+b)
# c = int(b)
# print(type(c))
# print(c + a)
print(int(b)+a)
# int() 强行将str 转成int ,有一定条件, 就是 这个str 必须长得像 int
print(int('1234'))

# str()
a = 2
b = '44'
print(str(a)+b)
print(type(str(a)+b))

a = 10
b = float(a)
print(type(a))
print(type(b))
print(b)